The abdomen in the first weeks of pregnancy remains unchanged. Its slight increase may be due solely to bloating due to disruption of the intestines. In the first days after conception, the uterus only begins to slightly increase in size. This process directly depends on the production of hormones that are responsible for the increase in the volume of muscle tissue. Of the external changes that may be noticeable, there is a blush on the cheeks, which appears due to intensive blood circulation in the body. Sometimes pregnant women face such an unpleasant problem as acne. It is also associated with hormonal changes in the body.